柯林斯詞典acetic acid /??si?t?k ??s?d/ 1. N-UNCOUNT Acetic acid is a colourless acid. It is the main substance in vinegar. 醋酸 返回 acetic acid劍橋詞典a clear acid with a strong smell , found in vinegar 乙酸，醋酸 返回 acetic acid